木材在潮湿的时候就会膨胀，而干燥的时候会缩小，这取决于其中含有的氢氧基团，它可以吸收和释放水分。

Timber swells when it is damp and shrinks when it is dry because it contains groups of atoms called hydroxyl groups, which absorb and release water.

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实际上，爱德华斯首次接触喷雾干燥技术可以追溯到他在一个食品科学实验室利用喷雾干燥机制造易吸入性药物喷雾剂的时候。

In fact, Edwards' first exposure to the spray drying process occurred when he was working with a spray dryer to produce highly respirable drug aerosols in a food science lab.

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即使在地面干燥的时候我都很难不摔倒，现在我还是回到床上去比较保险。

I had enough trouble not falling down when the ground was dry; it might be safer for me to go back to bed now.

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